org-macs: Fix typos in docstrings

* lisp/org-macs.el (org-split-string):
(org-string-width): Fix typo in docstring.

lisp/org-macs.el

@@ -51,8 +51,8 @@ Otherwise, return nil."
 SEPARATORS is a regular expression.  When nil, it defaults to
 \"[ \f\t\n\r\v]+\".
 
-Unlike to `split-string', matching SEPARATORS at the beginning
-and end of string are ignored."
+Unlike `split-string', matching SEPARATORS at the beginning and
+end of string are ignored."
   (let ((separators (or separators "[ \f\t\n\r\v]+")))
     (when (string-match (concat "\\`" separators) string)
       (setq string (replace-match "" nil nil string)))
@@ -124,7 +124,7 @@ text properties."
 
 (defun org-string-width (string)
   "Return width of STRING when displayed in the current buffer.
-Unlike to `string-width', this function takes into consideration
+Unlike `string-width', this function takes into consideration
 `invisible' and `display' text properties."
   (string-width (org-string-display string)))